sched/balancing: Change comment formatting to not overlap Git conflict marker lines

So the scheduler has two such comment blocks, with '=' used as a double underline:

        /*
         * VRUNTIME
         * ========
         *

'========' also happens to be a Git conflict marker, throwing off a simple
search in an editor for this pattern.

Change them to '-------' type of underline instead - it looks just as good.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20240308105901.1096078-7-mingo@kernel.org

kernel/sched/fair.c

@@ -3679,7 +3679,7 @@ static void reweight_eevdf(struct cfs_rq *cfs_rq, struct sched_entity *se,
 
 	/*
 	 * VRUNTIME
-	 * ========
+	 * --------
 	 *
 	 * COROLLARY #1: The virtual runtime of the entity needs to be
 	 * adjusted if re-weight at !0-lag point.
@@ -3762,7 +3762,7 @@ static void reweight_eevdf(struct cfs_rq *cfs_rq, struct sched_entity *se,
 
 	/*
 	 * DEADLINE
-	 * ========
+	 * --------
 	 *
 	 * When the weight changes, the virtual time slope changes and
 	 * we should adjust the relative virtual deadline accordingly.